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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - In x86-64 Cygwin, USER_LABEL_PREFIX should be empty"
href="https://llvm.org/bugs/show_bug.cgi?id=26744">26744</a>
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<th>Summary</th>
<td>In x86-64 Cygwin, USER_LABEL_PREFIX should be empty
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>tinysun.net@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>In Cygwin 64, the gcc compiler has not the underscore prefix as follows.
$ gcc -E -o - -dM -x c - < /dev/null | grep USER
#define __USER_LABEL_PREFIX__
$ clang-3.5.2 -E -o - -dM -x c - < /dev/null | grep USER
#define __USER_LABEL_PREFIX__ _
This macro is rarely used, but some library functions could not be linked. (ex.
basename(), BSD's qsort_r())</pre>
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